Called a siddur in Hebrew, it’s a prayer book that belonged to Marilyn Monroe.

Monroe converted to Judaism when she married one of America’s most famous playwrights, Arthur Miller.

“She made Jews very proud at the time,” said Jonathan Greenstein of Cedarhurst Gallery.

Of the things Monroe is best known for, being Jewish may not be on anyone’s list. But now the role religion played in her life story is front and center as her book goes up for auction at Cedarhurst Gallery.